<!DOCTYPE html>
<html>

<head>
    <meta charset='utf-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <title>Page Title</title>
    <meta name='viewport' content='width=device-width, initial-scale=1'>
    <link rel='stylesheet' type='text/css' media='screen' href='main.css'>
    <script src='main.js'>

    </script>
    <style>
        .father {
            width: 500px;
            height: 500px;
            background-color: red;
            padding: 200px;
            /* overflow: hidden; */
   
        }

        .son {
            width: 200px;
            height: 200px;
            background-color: aquamarine;
            margin-top: 200px;
        }

    </style>

</head>

<body>
    <div class="father">
        <div class="son">
        </div>
    </div>
</body>


</html>